PIC16C57C-20/SP - 8-bit OTP MCU, 3KB, 20MHz, 28-SPDIP | Microchip
MPN： PIC16C57C-20/SP ✓ 啟用中PIC16C57C-20/SP 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals onto one die, intended for embedded control tasks. Within the taxonomy, MCUs sit under microcontrollers -> 8-bit microcontrollers -> general-purpose embedded controllers -> semiconductor ICs. The PIC16C5X family pioneered Microchip's RISC-style instruction set and remains popular for cost-sensitive, deterministic bit-manipulation applications where code density and low part count matter more than raw throughput.
Key features of the PIC16C57C-20/SP include a two-level deep hardware stack, direct/indirect/relative addressing modes for both data and instructions, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, and a watchdog timer for unattended operation. Operating supply voltage spans 4.5 V to 5.5 V (commercial 0 C to +70 C range for the -20/SP speed grade), and I/O pins can source/sink 20 mA for direct LED or relay drive. The OTP memory allows one-time field programming, making this part well suited for low-to-medium volume production.
Typical applications include automotive body controllers, industrial appliance control, security panels, and remote sensor transmitters where the deterministic 100 ns instruction cycle and 33-instruction RISC core simplify firmware while keeping BOM cost minimal. The 28-pin SPDIP footprint is breadboard-friendly and supports hand-soldered prototyping as well as wave-soldered assembly.
When designing with this part, note that OTP precludes firmware upgrades; budget development effort for ROM emulator (ICE) verification or sample-window pre-production testing. For designs needing in-system reprogrammability, prefer the flash-based PIC16F57 successor or the PIC16F628A family which drop into similar footprints. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC16C57C-20/SP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C57C-20/SP （相同外形與佔位） — 差異在於 Package, Program Memory Type, Timers, Program Memory Size, Operating Temperature.
PIC16C57-10I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C57C-20I/SP
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16C57C-20/SP 最大額定值與電氣特性
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Type | OTP |
| Program Memory Size | 3 KB (2K x 12) |
| Data RAM Size | 72 B |
| Number of I/O Pins | 20 |
| 最大時脈頻率 | 20 MHz |
| Instruction Execution Time | 100 ns (at 20 MHz) |
| Number of Instructions | 33 single-word |
| Instruction Width | 12-bit |
| 資料匯流排寬度 | 8-bit |
| ADC | No |
| 工作電源電壓 | 4.5 V to 5.5 V |
| 工作溫度 | 0 C to +70 C |
| 封裝 | 28-SPDIP (0.300 inch, 7.62 mm) |
| 安裝類型 | Through Hole |
| Hardware Stack Depth | 2 levels |
| Timers | 1 x 8-bit (TMR0 with prescaler) |
| Watchdog Timer | Yes |
| I/O Sink/Source | 20 mA per pin |
PIC16C57C-20/SP 腳位配置
| 腳位 1 | RA0 — Bidirectional digital I/O / PORTA bit 0 |
| 腳位 2 | RA1 — Bidirectional digital I/O / PORTA bit 1 |
| 腳位 3 | RA2 — Bidirectional digital I/O / PORTA bit 2 |
| 腳位 4 | RA3 — Bidirectional digital I/O / PORTA bit 3 |
| 腳位 5 | RA4 — Bidirectional digital I/O / PORTA bit 4 / T0CKI |
| 腳位 6 | RA5 — Bidirectional digital I/O / PORTA bit 5 |
| 腳位 7 | RA6 — Bidirectional digital I/O / PORTA bit 6 |
| 腳位 8 | RA7 — Bidirectional digital I/O / PORTA bit 7 |
| 腳位 9 | VSS — Ground reference |
| 腳位 10 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| 腳位 11 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| 腳位 12 | RC0 — Bidirectional digital I/O / PORTB bit 0 |
| 腳位 13 | RC1 — Bidirectional digital I/O / PORTB bit 1 |
| 腳位 14 | RC2 — Bidirectional digital I/O / PORTB bit 2 |
| 腳位 15 | RC3 — Bidirectional digital I/O / PORTB bit 3 |
| 腳位 16 | RC4 — Bidirectional digital I/O / PORTB bit 4 |
| 腳位 17 | RC5 — Bidirectional digital I/O / PORTB bit 5 |
| 腳位 18 | RC6 — Bidirectional digital I/O / PORTB bit 6 |
| 腳位 19 | RC7 — Bidirectional digital I/O / PORTB bit 7 |
| 腳位 20 | VSS — Ground reference |
| 腳位 21 | RB0 — Bidirectional digital I/O / PORTC bit 0 |
| 腳位 22 | RB1 — Bidirectional digital I/O / PORTC bit 1 |
| 腳位 23 | RB2 — Bidirectional digital I/O / PORTC bit 2 |
| 腳位 24 | RB3 — Bidirectional digital I/O / PORTC bit 3 |
| 腳位 25 | RB4 — Bidirectional digital I/O / PORTC bit 4 |
| 腳位 26 | RB5 — Bidirectional digital I/O / PORTC bit 5 |
| 腳位 27 | VDD — Positive supply 4.5 V to 5.5 V |
| 腳位 28 | RESET/VPP — Reset input / programming high voltage |
典型應用
PIC16C57C-20/SP 適用於 7 應用s: Automotive Body Electronics, Industrial Appliance Control, Security and Alarm Panels, Remote Sensor Transmitters, Hobby and Education Kits, LED Display and Sign Controllers, Toy and Game Electronics.
Automotive Body Electronics
The PIC16C57C-20/SP's 20 MHz deterministic 100 ns instruction cycle, 20 mA per-pin drive, and 4.5-5.5 V single-supply operation make it well suited to automotive body controllers for window lift, mirror adjust, and lighting modules. Its 33-instruction RISC core keeps firmware auditable for MISRA-style coding rules. The 28-SPDIP through-hole footprint is friendly to automotive Tier-1 harness assembly lines that prefer wave soldering over reflow.
推薦
Industrial Appliance Control
White-goods controllers (washing machines, dishwashers, microwave ovens) benefit from the PIC16C57C-20/SP's low BOM cost, OTP security (firmware cannot be reverse-engineered and reflashed), and 20 digital I/O pins that handle keypads, relays, and seven-segment displays directly. The hardware watchdog timer and 100 ns interrupt latency suit safety-critical loops such as door-lock interlocks. Operating from a single 5 V rail simplifies the offline SMPS downstream of the mains rectifier.
推薦
Security and Alarm Panels
The PIC16C57C-20/SP's OTP program memory is a security plus for alarm panels: code cannot be extracted and rewritten, blocking casual firmware cloning. Its 20 I/O drive zone LEDs, keypads, piezo buzzers, and relay outputs directly without external drivers. The 20 MHz core handles encrypted keyfob rolling-code decoding and the watchdog timer latches the panel into safe state on firmware hang. 5 V-only operation pairs cleanly with backup-battery UPS topologies.
推薦
Remote Sensor Transmitters
Battery-powered wireless sensor nodes leverage the PIC16C57C-20/SP's 4.5-5.5 V supply and the deep-sleep-capable PIC16C5X architecture to duty-cycle an RF transmitter on for only milliseconds per measurement cycle. The 33-instruction core and 100 ns cycle let the MCU wake, sample a sensor bit-banged via I/O, and return to sleep within microseconds. 20 mA I/O directly keys an OOK/FSK transmitter module without an external buffer transistor.
推薦
Hobby and Education Kits
The PIC16C57C-20/SP's 28-SPDIP through-hole package drops directly into breadboards and perfboard, making it a favorite for hobbyists and university embedded-systems labs. The 33 single-word instructions can be taught in a single lab session, and the 20 I/O pins are enough to drive LEDs, pushbuttons, and 7-segment displays. Its 20 MHz instruction cycle is fast enough to demonstrate polled versus interrupt-driven real-time concepts without overwhelming a beginner.
推薦
LED Display and Sign Controllers
Multiplexed LED matrix controllers benefit from the PIC16C57C-20/SP's deterministic 100 ns instruction cycle, which supports software-PWM brightness control of common-anode or common-cathode arrays up to ~20 mA per row without flicker. The 20 I/O pins directly scan an 8x8 matrix or larger via external driver shift registers. The 5 V rail and 28-SPDIP through-hole construction are ideal for indoor commercial-sign installations where serviceability matters.
推薦
Toy and Game Electronics
Cost-sensitive consumer toys use the PIC16C57C-20/SP for its sub-$3 price point at qty 1000, OTP code protection that prevents cloning by competitors, and 20 I/O pins to drive motors, speakers, and IR LEDs. The 5 V single-supply operation simplifies battery-pack designs with three alkaline cells. The PIC16C5X 33-instruction RISC architecture compiles to dense code, so multi-mode toy logic fits within the 3 KB OTP without bank-switching complexity.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C57C-20/SP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C57C-20/SO | PIC16C57C-04E/SS | PIC16C57C-04/SS | PIC16C57-10I/P | PIC16C57C-20I/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (0.300 inch) | 28-SOIC (7.50 mm) | 28-SSOP (5.30 mm) | 28-SSOP (5.30 mm) | 28-PDIP (0.300 inch) | 28-SPDIP (0.300 inch) |
| Program Memory | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP |
| Max Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 4 MHz | 10 MHz | 20 MHz |
| Instruction Cycle | 100 ns | 100 ns | 1 us | 1 us | 200 ns | 100 ns |
| Data RAM | 72 B | 72 B | 72 B | 72 B | 72 B | 72 B |
| Number of I/O | 20 | 20 | 20 | 20 | 20 | 20 |
| Operating Temperature | 0 C to +70 C (commercial) | 0 C to +70 C | -40 C to +125 C (extended) | 0 C to +70 C | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
主要差異化特點
- Same-die option in SOIC-28 surface-mount for automated assembly (對比PIC16C57C-20/SO)
- Industrial-temperature drop-in for harsh environments (對比PIC16C57C-20I/SP)
- Lower-cost 4 MHz option for non-timing-critical designs (對比PIC16C57C-04/SS)
- Two-level hardware stack limits call depth (對比PIC16F57 (flash successor))
設計說明
PIC16C57C-20/SP requires a stable 5 V +/-10% supply; the 4.5 V minimum is absolute and brownouts below this reset the part via the integrated POR. Add a 100 nF decoupling cap on VDD (pin 27) within 5 mm of the package, and a 10 uF bulk cap on the same rail to absorb relay or motor inrush that may sag the 5 V rail. For automotive 12 V input, use a 7805 or switching pre-regulator followed by the MCU rail.
OTP memory can be programmed only once; firmware bugs locked into OTP cannot be patched in the field. Always validate firmware on a ROM-emulator (ICE2000 or PICkit 3 with OTP emulator) or a windowed PIC16C57C JW sample before committing to volume. Estimated: a single OTP programming cycle takes ~2 ms per word using the high-voltage VPP pulse on the RESET/VPP pin (pin 28); design the programming fixture to apply 13 V VPP with proper timing.
Place the 28-SPDIP oscillator crystal or resonator as close as possible to pins 10-11 (OSC1/OSC2) to minimize PCB trace capacitance. Keep clock traces short and ground them with a continuous ground plane. Add a 10 kohm pull-up on RESET/VPP (pin 28) and a 100 nF cap to ground if hardware reset is not driven externally; omitting this leaves the pin floating and causes spurious resets from EMI.
Estimated: at 20 MHz clock and full I/O toggle, PIC16C57C-20/SP draws ~25 mA from VDD, dissipating roughly 125 mW at 5 V. The 28-SPDIP package theta-JA is approximately 70 C/W, so a junction rise of ~9 C above ambient is expected in still air. No heatsink is required, but ensure airflow or PCB copper pour around the package for sustained operation near 70 C ambient.
合規資訊
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC16C57C-20E/SP (extended temp) for harsh environments but verify automotive requirements separately. Lead-free reflow profile per JEDEC J-STD-020.
